Tube mill



A. E. ALGER Oct. 11,` 1938.

TUBE MILL 2 Sheets-Sheet l w bww/dof:

Filed Oct. 14, 1955 Oct. l1, 1938.

A.E.ALGER TUBE MILL 2 Sheets-Sheet 2 Filed Oct. 14, 1955 LLA/N E. @L5/5Patented Oct. 11, 1938 y UNITED' STATES PATENT OFFICE TUBE DIILLApplication October 14, 1935, Serial/No. 44,949

1 Claim.

This invention relates to tube mills and particularly to those utilizingdiagonal rolling rolls, one of the objects being to produce properlygaged tubes by means of such mills. Other objects may be inferred.

A specic example of the present invention is illustrated by theaccompanying drawings, in which:

Figures l and 2 show a mill embodying the principles of the present.invention and respectively show the two operating stages,`describedhereinafter, involved by its use, and

Figure 3 is a detailed sectional View of the latch and carriageconstruction.

The mill illustrated by the above drawings includes a set of diagonalrolling rolls l, a carriage 2 arranged to reciprocate in line withtheworking pass of the rolls l, a mandrel bar 3 rotatively mounted bythe carriage 2 so as to project toward this working pass, a mandrel 4mounted by the forward end of the bar 3 and a latch 5 for releasablypreventing the carriage 2 from moving backwardly from a position whereit holds the mandrel 4 in spaced relationship respecting the workingsurfaces of the rolls I.

Theabove mill is intended to rotary-roll tube blanks to gage, and thisgage is determined by the spacing of the mandrel 4 respecting theWorking surfaces of the rolls l. ,To produce a 30 properly gaged productthis spacing [must be measurable so that `its proper maintenance ispossible.

Continuing, the mill being described further includes an abutment S thatis carried by the carriage 2 whereby it is arranged to move with thesame, a lever 'l that is pivoted adjacent the reciprocative path of thecarriage 2 so that one of its ends can be swung backwardly into contactwith the abutment 6r, ameans 8 for urging this lever 1 toswing forwardlyand away from the abutment 6, remotely indicating means 9 for measuringthe extent the lever 1 yswings and .remotelyr operable means i0 forswinging the lever 'l kbackwardly into contact withyth'e abut'- ments. l

vMore speciflcflly, the leyer 1 may b e. connected kwith a gear segmentIa that meshesfwith a pinion 'the4 means may consist "of aweighttheremotely indicating Amfis 4B-may consist Lof an indicating v'device`pl'vded ,with ya ,suitablyv '$9111'- brated dial .and connectedto vanyconyentional type of operating mechanism!! .through a suitable cable 9b,the transl:,ritter,8*l being k'driven by `the pinion 1l', andk the'remotely 'opcrablermeans I'll may consist of a levertl'iat is 'arrangedto pullfa rope l0* that is` bent around'a. sries of sheaves "lob so `asto'conn'ect they 8,

(o1. gio-13) this rope passing over a quadrant 1 that moves with thegear segment 1a connected with the lever 1.

In operation, the mill operator moves the carriage 2 forwardly until thevmandrel 4 contacts the working surfaces of the rolls I. He then throwsthe lever lll so as to pull on the rope I0 and throw the lever 1 againstthe force of the weight 8 until this lever is swung backwardly intocontact with the abutment 6, whereupon he notes the reading provided bythe dial associated with the Selsyn receiver. Next he moves the carriage2 backwardly until stopped by the latch 5 and again throws the lever I0so as to again obtain a reading on the dial associated with the Selsynreceiver 9.

After the operator has.done these. things he can easily determine thedistance it was neces: sary to move the carriage 2 from the positionwhere the mandrel 4 contacted the working sur' faces of the rolls l toone where the carriage was stopped by the latch 5. This is eifected by acomparison of the two readings he obtained. Since the position where thecarriage 2 is stopped by the latch 5 determines the Aworking position ofthe mandrel 4, and since he knows the distance he had to move thecarriage 2 to reach this position from one where thejcarriage waspositioned to hold the mandrel 4 in Contact with the working surfaces ofthe rolls |,'the operator consequently knows the distance this mandrelis spaced from these working rolls and isthus able to make whateveradjustments of the rolls or carriage are necessary as may :be requiredto maintain the relation at a predetermined setting which will producetubes of the required wall thickness having a minimum variation."

In combination withv a rotary rolling mill, of means for gauging thespace `between the inan-` drel and the working surfaces of the millrolls to determine the necessary adjustment of the mandrel and millrolls to produce a tube ofthe required wall thickness vwith a ymininmimvaria,- tion, comprising anfabutment carried .byand movable-withthe-.inni mandrel 'b farfy jcaiiriagefa 1 lever pivoted adiacentttfxeAsaid carriage, means adapted toI l into contact with said abutment andlrriiearris ever koperable .by the 'moyenent of said for remotelyindicatingthe relative ioi'wardand rearward movement of a mill mandrel?ar wherefrerenc insaid'readins e u.

by Calculation .01th, ei. will determine .the "adjustment necessary'drel and mill 10118.. l

4said lever

